Application study of “dual seal” technology in the seal retrofitting of rotary air preheater;

A new-type dual seal with reversible seal head and balanced type was designed.

has adopted “air preheater double seal” technology of ABB-API Co.

The working principle and traditional rotor module of air preheater are introduced herein, Main featuers of semi-module and double seal that are most advanced in world are emphasisly introduced, Combin with these features illuminated the leakage air reduction measures of air preheater.

Introducing the structural characteristics and operation conditions of double seal hydraulic flat gate valve for slurry transportation pipeline, describing simply the making, application and maintenance of valves.

Adaptive watermarking scheme of double keys based on DWT;